Blueberry rum is just white or spiced rum with blueberries soaked in it. It's very flavorful if you soak them for a couple of weeks, but a couple of hours will still give you a nice flavor, especially if you use frozen blueberries. Ginger syrup is simple syrup with about 2-inches raw ginger added at the beginning for 1 cup water. Your rooftop deck is amazing!